Achievements
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He won two medals at the inaugural event at the FIL World Luge Championships in Oslo in 1955 with a silver in the men"s doubles and a bronze in the men"s singles events. His silver in the men"s doubles was with his sister Maria marked the only time a woman ever won a medal in a men"s event at a World Championships, Winter Olympics, or European Championships until the debut of a mixed team event at both the European and World Championships in the late 1980s. Isser also won four medals at the European luge championships with two golds (Men"s singles: 1956, Men"s doubles: 1954), one silver (Men"s doubles: 1951), and one bronze (Men"s bronze: 1952). In bobsleigh, Isser won three medals at the FIBT World Championships with one silver (Two-man: 1955) and two bronzes (Two-man: 1958, Four-man: 1962).
